Observational studyDermatology (Basel, Switzerland)2021
Characterization of Patients with Psoriasis in Challenging-to-Treat Body Areas in the Corrona Psoriasis Registry.
Observational study in Dermatology (Basel, Switzerland), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
22 citing papers in PubMed, 1 synthesis or guideline pooled it, 33 citations in OpenAlex.
- Short-term efficacy of biologics targeting the IL-17/IL-23 axis in scalp, nail, and palmoplantar psoriasis: a network meta-analysis of randomized controlled trials.Frontiers in immunology · 2026Pooled it
- Long-Term Safety and Efficacy of Risankizumab to Treat Moderate-to-Severe Plaque Psoriasis: Final LIMMitless Phase 3, Open-Label Extension Trial Results.American journal of clinical dermatology · 2025Trial
- Efficacy of Ixekizumab in Chinese Patients with Moderate-to-Severe Psoriasis and Special Body Area Involvement: Sub-analysis of a Randomized, Double-Blind, Multicenter Phase 3 Study.Advances in therapy · 2025Trial
- Article
- Efficacy of a topical polyphenol-based formulation in palmoplantar psoriasis: an observational study.Dermatology reports · 2026Article
- Real-World Effectiveness of Brodalumab in Challenging Psoriasis Subgroups: Insights from the PSO-TARGET Cohort.Dermatology and therapy · 2026Article
- Tildrakizumab in Managing Psoriasis with Involvement of Difficult-to-Treat Areas: A Multicenter Real-Life Retrospective Study.Journal of clinical medicine · 2026Article
- Hard-to-Treat Areas in Psoriasis: An Underevaluated Part of the Disease.Life (Basel, Switzerland) · 2025Review
- Brodalumab Is Effective for Psoriasis Patients with Difficult-To-Treat Body Regions: Results from an Observational Clinical Study.Dermatology (Basel, Switzerland) · 2025Observational
- Palmoplantar Psoriasis: Epidemiological and Clinical Features and Impact on Quality of Life.Dermatology practical & conceptual · 2024Article
- Effectiveness of Ixekizumab in Chinese Patients with Moderate-Severe Plaque Psoriasis with Special Area Involvement: Subanalysis of a Prospective, Multicenter, Observational Real-World Study.Dermatology and therapy · 2024Article
- Sustained Improvements in Clinical and Patient-Reported Outcomes and Quality of Life Through 5 Years Among Ixekizumab-Treated Patients with Complete Clearance of Scalp Psoriasis by Week 60.Dermatology and therapy · 2024Article
- Speed and Cumulative Responses According to Body Regions in Patients with Moderate-to-Severe Plaque Psoriasis Treated with Ixekizumab (Interleukin-17A Antagonist) versus Guselkumab (Interleukin-23p19 Inhibitor).Dermatology and therapy · 2024Article
- Article
- Response rates in clinical quality registries and databases that collect patient reported outcome measures: a scoping review.Health and quality of life outcomes · 2023Article
- Brodalumab for the Treatment of Moderate-to-Severe Psoriasis: An Expert Delphi Consensus Statement.Journal of clinical medicine · 2023Article
- Bimekizumab in the Treatment of Plaque Psoriasis: Focus on Patient Selection and Perspectives.Patient preference and adherence · 2023Review
- Effectiveness of Brodalumab in Patients with Moderate-to-Severe Plaque Psoriasis Located in Difficult-to-Treat Areas.Clinical, cosmetic and investigational dermatology · 2023Article
- Comparative effectiveness of biologics for patients with moderate-to-severe psoriasis and special area involvement: week 12 results from the observational Psoriasis Study of Health Outcomes (PSoHO).Frontiers in medicine · 2023Article
- Psoriasis Management Challenges Regarding Difficult-to-Treat Areas: Therapeutic Decision and Effectiveness.Life (Basel, Switzerland) · 2022Review
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 4 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundReal-world studies evaluating patients with challenging-to-treat localizations of psoriasis (scalp, nail, and palmoplantar) are limited.
objectiveTo characterize patients with versus without psoriasis in challenging-to-treat areas seen in routine US clinical practice.
methodsThis retrospective observational study included all adult patients with psoriasis enrolled in the Corrona Psoriasis Registry between April 2015 and May 2018 who initiated a biologic therapy at registry enrollment. Patients were stratified by the presence of scalp, nail, or palmoplantar psoriasis (nonmutually exclusive groups). Patient demographics, clinical char-acteristics, disease activity, and patient-reported outcome measures (pain, fatigue, itch, EuroQol visual analog scale [EQ VAS], Dermatology Life Quality Index [DLQI], and Work Productivity and Activity Impairment questionnaire [WPAI]) were assessed at registry enrollment and compared between patients with versus without each challenging-to-treat area using nonparametric Kruskal-Wallis tests for continuous variables and χ2 or Fisher exact tests for categorical variables. Generalized linear regression models were used to estimate differences in disease activity and patient-reported outcomes between patients with versus without each challenging-to-treat area.
resultsAmong 2,042 patients with psoriasis (mean age [±SD], 49.6 ± 14.7 years; 51.5% male), 38.4% had psoriatic arthritis (PsA), 38.1% had scalp psoriasis, 16.0% had nail psoriasis, 10.9% had palmoplantar psoriasis, and 26.2% had a combination of ≥2 challenging-to-treat areas and PsA; only 34.2% had body plaque psoriasis without PsA or challenging-to-treat areas. Patients in all challenging-to-treat groups reported higher (mean [95% CI]) itch (scalp, 58.01 [57.62-58.40] vs. 54.35 [53.99-54.72]; nail, 56.42 [56.02-56.81] vs. 55.59 [55.20-55.97]; palmoplantar, 60.22 [59.86-60.59] vs. 55.15 [54.79-55.54]) and lower EQ VAS (scalp, 68.12 [67.78-68.48] vs. 69.46 [69.12-69.81]; nail, 66.21 [65.89-66.55] vs. 69.48 [69.14-69.83]; palmoplantar, 66.21 [66.07-66.75] vs. 69.29 [68.94-69.94]) scores than those without the respective challenging-to-treat localization. Patients with nail or palmoplantar psoriasis reported higher pain, fatigue, and DLQI scores than those without. Higher proportions of patients with scalp or palmoplantar psoriasis reported work impairment compared with those without.
conclusionTwo-thirds of patients with psoriasis who initiated biologic therapy had PsA and/or ≥1 challenging-to-treat area. Patients with challenging-to-treat areas had worse patient-reported outcome scores than those without, indicating a significant burden of challenging-to-treat areas on patients' quality of life.
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